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docs/src/pages/framed/RecursiveList/RecursiveListFlatArray.svelte
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<script> | ||
import { RecursiveList, toHierarchy } from "carbon-components-svelte"; | ||
const nodesFlat = [ | ||
{ id: 1, text: "Item 1" }, | ||
{ id: 2, text: "Item 1a", pid: 1 }, | ||
{ id: 3, html: "<h5>HTML content</h5>", pid: 2 }, | ||
{ id: 4, text: "Item 2" }, | ||
{ id: 5, href: "https://svelte.dev/", pid: 4 }, | ||
{ | ||
id: 6, | ||
href: "https://svelte.dev/", | ||
text: "Link with custom text", | ||
pid: 4, | ||
}, | ||
{ id: 7, text: "Item 3" }, | ||
]; | ||
</script> | ||
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<RecursiveList nodes={toHierarchy(nodesFlat, (node) => node.pid)} /> |
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<script> | ||
import { TreeView, toHierarchy } from "carbon-components-svelte"; | ||
import Analytics from "carbon-icons-svelte/lib/Analytics.svelte"; | ||
let nodesFlat = [ | ||
{ id: 0, text: "AI / Machine learning", icon: Analytics }, | ||
{ id: 1, text: "Analytics" }, | ||
{ id: 2, text: "IBM Analytics Engine", pid: 1 }, | ||
{ id: 3, text: "Apache Spark", pid: 2 }, | ||
{ id: 4, text: "Hadoop", pid: 2 }, | ||
{ id: 5, text: "IBM Cloud SQL Query", pid: 1 }, | ||
{ id: 6, text: "IBM Db2 Warehouse on Cloud", pid: 1 }, | ||
{ id: 7, text: "Blockchain" }, | ||
{ id: 8, text: "IBM Blockchain Platform", pid: 7 }, | ||
{ id: 9, text: "Databases" }, | ||
{ id: 10, text: "IBM Cloud Databases for Elasticsearch", pid: 9 }, | ||
{ id: 11, text: "IBM Cloud Databases for Enterprise DB", pid: 9 }, | ||
{ id: 12, text: "IBM Cloud Databases for MongoDB", pid: 9 }, | ||
{ id: 13, text: "IBM Cloud Databases for PostgreSQL", pid: 9 }, | ||
{ id: 14, text: "Integration", disabled: true }, | ||
{ id: 15, text: "IBM API Connect", disabled: true, pid: 14 }, | ||
]; | ||
</script> | ||
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<TreeView | ||
labelText="Cloud Products" | ||
nodes={toHierarchy(nodesFlat, (node) => node.pid)} | ||
/> |
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export { default as TreeView } from "./TreeView.svelte"; |
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type NodeLike = { | ||
id: string | number; | ||
nodes?: NodeLike[]; | ||
[key: string]: any; | ||
}; | ||
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/** Create a hierarchical tree from a flat array. */ | ||
export function toHierarchy< | ||
T extends NodeLike, | ||
K extends keyof Omit<T, "id" | "nodes">, | ||
>( | ||
flatArray: T[] | readonly T[], | ||
/** | ||
* Function that returns the parent ID for a given node. | ||
* @example | ||
* toHierarchy(flatArray, (node) => node.parentId); | ||
*/ | ||
getParentId: (node: T) => T[K] | null, | ||
): (T & { nodes?: (T & { nodes?: T[] })[] })[]; | ||
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export default toHierarchy; |
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// @ts-check | ||
/** | ||
* Create a nested array from a flat array. | ||
* @typedef {Object} NodeLike | ||
* @property {string | number} id - Unique identifier for the node | ||
* @property {NodeLike[]} [nodes] - Optional array of child nodes | ||
* @property {Record<string, any>} [additionalProperties] - Any additional properties | ||
* | ||
* @param {NodeLike[]} flatArray - Array of flat nodes to convert | ||
* @param {function(NodeLike): (string|number|null)} getParentId - Function to get parent ID for a node | ||
* @returns {NodeLike[]} Hierarchical tree structure | ||
*/ | ||
export function toHierarchy(flatArray, getParentId) { | ||
/** @type {NodeLike[]} */ | ||
const tree = []; | ||
const childrenOf = new Map(); | ||
const itemsMap = new Map(flatArray.map((item) => [item.id, item])); | ||
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flatArray.forEach((item) => { | ||
const parentId = getParentId(item); | ||
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// Only create nodes array if we have children. | ||
const children = childrenOf.get(item.id); | ||
if (children) { | ||
item.nodes = children; | ||
} | ||
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// Check if parentId exists using Map instead of array lookup. | ||
const parentExists = parentId && itemsMap.has(parentId); | ||
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if (parentId && parentExists) { | ||
if (!childrenOf.has(parentId)) { | ||
childrenOf.set(parentId, []); | ||
} | ||
childrenOf.get(parentId).push(item); | ||
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const parent = itemsMap.get(parentId); | ||
if (parent) { | ||
parent.nodes = childrenOf.get(parentId); | ||
} | ||
} else { | ||
tree.push(item); | ||
} | ||
}); | ||
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return tree; | ||
} | ||
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export default toHierarchy; |
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<script lang="ts"> | ||
import { RecursiveList } from "carbon-components-svelte"; | ||
import toHierarchy from "../../src/utils/toHierarchy"; | ||
let nodes = toHierarchy( | ||
[ | ||
{ id: 1, text: "Item 1" }, | ||
{ id: 2, text: "Item 1a", pid: 1 }, | ||
{ id: 3, html: "<h5>HTML content</h5>", pid: 2 }, | ||
{ id: 4, text: "Item 2" }, | ||
{ id: 5, href: "https://svelte.dev/", pid: 4 }, | ||
{ | ||
id: 6, | ||
href: "https://svelte.dev/", | ||
text: "Link with custom text", | ||
pid: 4, | ||
}, | ||
{ id: 7, text: "Item 3" }, | ||
], | ||
(node) => node.pid, | ||
); | ||
</script> | ||
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<RecursiveList type="ordered" {nodes} /> |
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import { render, screen } from "@testing-library/svelte"; | ||
import RecursiveListHierarchyTest from "./RecursiveList.hierarchy.test.svelte"; | ||
import RecursiveListTest from "./RecursiveList.test.svelte"; | ||
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const testCases = [ | ||
{ name: "RecursiveList", component: RecursiveListTest }, | ||
{ name: "RecursiveList hierarchy", component: RecursiveListHierarchyTest }, | ||
]; | ||
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describe.each(testCases)("$name", ({ component }) => { | ||
it("renders all top-level items", () => { | ||
render(component); | ||
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expect(screen.getByText("Item 1")).toBeInTheDocument(); | ||
expect(screen.getByText("Item 2")).toBeInTheDocument(); | ||
expect(screen.getByText("Item 3")).toBeInTheDocument(); | ||
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expect(screen.getAllByRole("list")).toHaveLength(4); | ||
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// Nested items | ||
expect(screen.getByText("Item 1a")).toBeInTheDocument(); | ||
}); | ||
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it("renders HTML content", () => { | ||
render(component); | ||
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const htmlContent = screen.getByText("HTML content"); | ||
expect(htmlContent.tagName).toBe("H5"); | ||
}); | ||
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it("renders links correctly", () => { | ||
render(component); | ||
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const links = screen.getAllByRole("link"); | ||
expect(links).toHaveLength(2); | ||
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// Link with custom text | ||
const customLink = screen.getByText("Link with custom text"); | ||
expect(customLink).toHaveAttribute("href", "https://svelte.dev/"); | ||
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// Plain link | ||
const plainLink = links.find( | ||
(link) => link.textContent === "https://svelte.dev/", | ||
); | ||
expect(plainLink).toHaveAttribute("href", "https://svelte.dev/"); | ||
}); | ||
}); |
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<script lang="ts"> | ||
import { Button, TreeView } from "carbon-components-svelte"; | ||
import { toHierarchy } from "../../src/utils/toHierarchy"; | ||
import type { TreeNodeId } from "carbon-components-svelte/TreeView/TreeView.svelte"; | ||
import Analytics from "carbon-icons-svelte/lib/Analytics.svelte"; | ||
let treeview: TreeView; | ||
let activeId: TreeNodeId = ""; | ||
let selectedIds: TreeNodeId[] = []; | ||
let expandedIds: TreeNodeId[] = []; | ||
let nodes = toHierarchy( | ||
[ | ||
{ id: 0, text: "AI / Machine learning", icon: Analytics }, | ||
{ id: 1, text: "Analytics" }, | ||
{ id: 2, text: "IBM Analytics Engine", pid: 1 }, | ||
{ id: 3, text: "Apache Spark", pid: 2 }, | ||
{ id: 4, text: "Hadoop", pid: 2 }, | ||
{ id: 5, text: "IBM Cloud SQL Query", pid: 1 }, | ||
{ id: 6, text: "IBM Db2 Warehouse on Cloud", pid: 1 }, | ||
{ id: 7, text: "Blockchain" }, | ||
{ id: 8, text: "IBM Blockchain Platform", pid: 7 }, | ||
{ id: 9, text: "Databases" }, | ||
{ id: 10, text: "IBM Cloud Databases for Elasticsearch", pid: 9 }, | ||
{ id: 11, text: "IBM Cloud Databases for Enterprise DB", pid: 9 }, | ||
{ id: 12, text: "IBM Cloud Databases for MongoDB", pid: 9 }, | ||
{ id: 13, text: "IBM Cloud Databases for PostgreSQL", pid: 9 }, | ||
{ id: 14, text: "Integration", disabled: true }, | ||
{ id: 15, text: "IBM API Connect", disabled: true, pid: 14 }, | ||
], | ||
(node) => node.pid, | ||
); | ||
$: console.log("selectedIds", selectedIds); | ||
</script> | ||
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<TreeView | ||
bind:this={treeview} | ||
size="compact" | ||
labelText="Cloud Products" | ||
{nodes} | ||
bind:activeId | ||
bind:selectedIds | ||
bind:expandedIds | ||
on:select={({ detail }) => console.log("select", detail)} | ||
on:toggle={({ detail }) => console.log("toggle", detail)} | ||
on:focus={({ detail }) => console.log("focus", detail)} | ||
let:node | ||
> | ||
{node.text} | ||
</TreeView> | ||
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<Button on:click={treeview.expandAll}>Expand all</Button> | ||
<Button | ||
on:click={() => { | ||
treeview.expandNodes((node) => { | ||
return /^IBM/.test(node.text); | ||
}); | ||
}} | ||
> | ||
Expand some nodes | ||
</Button> |
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